One of the best thing that ever happened in the world of plugins and extensions is this Theme Switcher. This magento extension allows you to control your layouts and decide how it should be displayed for devices.
Key Features :
Easy installation and configuration.
Compatible with Magento Community Edition 1.4 – 1.5 – 1.6 – 1.7 – 1.8 – 1.9.
Auto-switch store layout
Allow choosing CMS homepage for each template
Show the default theme in case no theme is predefined.
Support 34 types of browsers.
Support 17 platforms.
Demo Link of Theme Switcher Magento
Download link of Theme Switcher Magento